/*
 * PImpl.h
 *
 * This source file is part of the FoundationDB open source project
 *
 * Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include <memory>

template <class T>
class PImpl {
	std::unique_ptr<T> impl;
	struct ConstructorTag {};
	template <class... Args>
	PImpl(ConstructorTag, Args&&... args) : impl(std::make_unique<T>(std::forward<Args>(args)...)) {}

public:
	PImpl() = default;
	template <class... Args>
	static PImpl create(Args&&... args) {
		return PImpl(ConstructorTag{}, std::forward<Args>(args)...);
	}
	T& operator*() { return *impl; }
	T const& operator*() const { return *impl; }
	T* operator->() { return impl.get(); }
	T const* operator->() const { return impl.get(); }
};
